Bentley unveiling plug-in hybrid concept

A plug-in hybrid version of the Bentley Mulsanne will be shown at the Beijing International Automotive Exhibition on April 20.

Bentley cars, known for their luxury and speed, are also about to become more fuel efficient.

Bentley Motors will show a version of its flagship Mulsanne equipped with plug-in hybrid technology at the Beijing International Automotive Exhibition on April 20.

To demonstrate that fuel efficiency can be paired with luxury, the car will feature a copper exterior and accents, including copper details to the headlamps. It will also have interior styling that highlights the car's electrical veins, the company said in a release.

But, it's just a concept car. The first vehicle Bentley will sell equipped with the plug-in hybrid technology will be a new SUV model, expected to be available in 2017.

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Bentley CEO Wolfgang Schreiber expects the company to gradually introduce the plug-in hybrid technology in a number of its models. Its hybrids will be capable of driving at least 50 km on electric power alone. The company said the technology will reduce CO2 emissions by 70%.